Look up in the night sky and what do you see? Probably a whole lot of light — and not from celestial bodies.

The loss of our dark skies to lights from cities and satellites is becoming more and more apparent, to the point that experts have a name for it. “Noctalgia” is the grief that comes with no longer being able to look up and see a number of stars at night, according to Space.com.

The growing effects of this are becoming more and more apparent. Northeastern University associate teaching professor Alessandra Di Credico sees this when she teaches astronomy: Many of her students say they’ve never seen any part of the Milky Way.

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